Anion Exchange‐Induced Crystal Engineering via Hot‐Pressing Sublimation Affording Highly Efficient and Stable Perovskite Solar Cells
Ding, Bin; Peng, Jun; Chu, Qian-Qian; Zhao, Shenyou; Shen, Heping; Weber, Klaus; Yang, Guan-Jun; White, Thomas; Catchpole, Kylie; Nazeeruddin, Mohammad Khaja; Dyson, Paul J.
Crystalline, dense, and uniform perovskite thin films are crucial for achieving high-power conversion efficiency solar cells. Herein, a universal method of fabricating highly crystalline and large-grain perovskite films via crystal engineering is demonstrated. Anion exchange of Cl− and I−, and annealing perovskite films, in an ultraconfined and uniform temperature enclosed space with saturated MAI (or FAI) vapor using hot-pressing sublimation technology are conducted. This process ensures a...[Show more]
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